2018年1月25日閲覧。 ^ a b c "Ice Station Rescue". BBC. 2018年1月26日閲覧。 ^ a b c "Unseen Enemy". CNN. 2018年2月6日閲覧。 ^ a b "Comment je Suis Devenue Invisible". France
Catmull, Ed; Amy Wallace (2014). Creativity, Inc.: Overcoming theUnseen Forces That Stand in the Way of True Inspiration. New York: Random House. pp. 253–254
"Unseen Cinema" Available at: http://www.antheil.org/FilmProgram.html ^ The American Film Institute Catalog Feature Films: 1921-30, The American Film Institute
“The Spiders (1919–1920)”. silentera.com. May 22, 2014閲覧。 ^ “Lederstrumpf”. silentera.com. May 22, 2014閲覧。 ^ “Unseen Forces (1920)”. National Film Preservation